:root {
  --bg: #0b0f17;
  --panel: #0f1624;
  --muted: #a0aec0;
  --text: #e6edf3;
  --brand: #7c9cff;
  --brand-600: #5e7ef0;
  --border: #1f2937;
}

* { box-sizing: border-box; }
html, body, #root { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

.container {
  display: grid;
  grid-template-rows: auto 1fr auto;
  height: 100%;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0));
}
.logo {
  width: 28px; height: 28px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--brand), var(--brand-600));
}
.title { font-weight: 600; letter-spacing: 0.2px; }
.title a { color: var(--brand); text-decoration: none; }
.title a:hover { text-decoration: underline; }
.subtitle { color: var(--muted); font-size: 13px; }
.subtitle a { color: var(--brand); text-decoration: none; }
.subtitle a:hover { text-decoration: underline; }

.messages {
  overflow: auto;
  padding: 20px;
}
.bubble {
  max-width: 800px;
  margin: 10px auto;
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 10px;
}
.avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: #1f2937; display:flex; align-items:center; justify-content:center;
  font-size: 14px; color: #9ca3af;
}
.role { font-size: 11px; color: var(--muted); margin-bottom: 6px; }
.content {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 12px 14px;
  border-radius: 10px;
  line-height: 1.6;
}
.ChatBot .content { background: rgba(124,156,255,0.07); border-color: rgba(124,156,255,0.22); }

.composer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  background: linear-gradient(0deg, rgba(255,255,255,0.02), rgba(255,255,255,0));
}
.input {
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 12px;
  border-radius: 10px;
  outline: none;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}
.send {
  background: var(--brand);
  border: 0;
  color: #0a1020;
  font-weight: 600;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}
.send:disabled { opacity: 0.6; cursor: not-allowed; }

.hint { text-align:center; color: var(--muted); font-size: 13px; padding-bottom: 6px; }

/* Markdown styles */
.content h1, .content h2, .content h3, .content h4, .content h5, .content h6 {
  margin: 16px 0 8px 0;
  font-weight: 600;
  color: var(--text);
}
.content h1 { font-size: 1.5em; }
.content h2 { font-size: 1.3em; }
.content h3 { font-size: 1.2em; }
.content h4 { font-size: 1.1em; }
.content h5 { font-size: 1em; }
.content h6 { font-size: 0.9em; }

.content p {
  margin: 8px 0;
}

.content code {
  background: rgba(124,156,255,0.15);
  color: #a5b4fc;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
  font-size: 0.9em;
}

.content pre {
  background: #0a0e1a;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  margin: 12px 0;
  overflow-x: auto;
}

.content pre code {
  background: none;
  color: var(--text);
  padding: 0;
  border-radius: 0;
  font-size: 0.85em;
  line-height: 1.5;
}

.content blockquote {
  border-left: 3px solid var(--brand);
  margin: 12px 0;
  padding-left: 12px;
  color: var(--muted);
  font-style: italic;
}

.content ul, .content ol {
  margin: 8px 0;
  padding-left: 20px;
}

.content li {
  margin: 4px 0;
}

.content a {
  color: var(--brand);
  text-decoration: none;
}

.content a:hover {
  text-decoration: underline;
}

.content table {
  border-collapse: collapse;
  width: 100%;
  margin: 12px 0;
}

.content th, .content td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}

.content th {
  background: rgba(124,156,255,0.1);
  font-weight: 600;
}

.content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 16px 0;
}